Is this coil safe to use?

[navid]

Well, the force it took to get this SOB out was enough to crack the shitty plastic. Is the coil safe to use?

 

The leads are still intact.

[sweetscience]

Firstly, test the impedance/continuity with a multimeter described in the shop manual in section 8-138.  If within spec, straighten it out, use JB Weld or the like to cover the exposed leads to prevent possible shorts. 

What to check:  In reference to your pic above,

1. Check the Primary coil resistance is at 1.19-1.61 Ohms.  Attach the tester leads to the primary and secondary coil terminals. 

2.  The Secondary coil resistance is 8.50-11.50 Ohms.  Attach the negative probe of your multimeter to any one of the ignition coil terminal.  Then attach the positive probe to the spark plug terminal (the base of the coil were it connects to the spark plug).

 

Before installing, add silicone base lube to the rubber boot, eg: 3M #75 silicone spray.

New coils are 90$ each.  GL 

Edited December 26, 2024 by sweetscience
additional info

[navid]

1 hour ago, sweetscience said:

Firstly, test the impedance/continuity with a multimeter described in the shop manual in section 8-138.  If within spec, straighten it out, use JB Weld or the like to cover the exposed leads to prevent possible shorts. 

What to check:  In reference to your pic above,

1. Check the Primary coil resistance is at 1.19-1.61 Ohms.  Attach the tester leads to the primary and secondary coil terminals. 

2.  The Secondary coil resistance is 8.50-11.50 Ohms.  Attach the negative probe of your multimeter to any one of the ignition coil terminal.  Then attach the positive probe to the spark plug terminal (the base of the coil were it connects to the spark plug).

 

Before installing, add silicone base lube to the rubber boot, eg: 3M #75 silicone spray.

New coils are 90$ each.  GL 

Thank you, I appreciate your advice. I'll measure them tonight. If they're in spec, I'll cover the crack with epoxy. The crack exposes the leads and I don't want moisture to get there.

 

I was considering lube, but didn't add it as I didn't see any sign of it when I took it out. Would make it easier to remove haha.

Edited December 26, 2024 by navid

[cornerslider]

Even if the coils are $90 each, what is your time/frustration worth when it ultimately fails??? Imagine sitting on the side of the road, KNOWING what failed. It won't happen on your way home from somewhere. I will happen on gorgeous day, when you're riding to meet some friends someplace fun..... My advise, replace the coils- 

[navid]

4 hours ago, cornerslider said:

Even if the coils are $90 each, what is your time/frustration worth when it ultimately fails??? Imagine sitting on the side of the road, KNOWING what failed. It won't happen on your way home from somewhere. I will happen on gorgeous day, when you're riding to meet some friends someplace fun..... My advise, replace the coils- 

I thought about it. Between here and Reddit, opinion is 50-50 on reusing. I  get your point as well, but I tested the leads and they were in spec. I completely straightened it out and sealed the crack with epoxy.

 

If after all that it fails, it'd suck massively, but I think the engine could run on one cylinder for some times. I'm damn fearful of having to service that spark plug again... every 12000 miles.